JPS6486502A - Manufacture of permanent magnet - Google Patents
Manufacture of permanent magnetInfo
- Publication number
- JPS6486502A JPS6486502A JP63196826A JP19682688A JPS6486502A JP S6486502 A JPS6486502 A JP S6486502A JP 63196826 A JP63196826 A JP 63196826A JP 19682688 A JP19682688 A JP 19682688A JP S6486502 A JPS6486502 A JP S6486502A
- Authority
- JP
- Japan
- Prior art keywords
- alloy
- bath temperature
- columnar crystals
- mold
- melting point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000000956 alloy Substances 0.000 abstract 7
- 229910045601 alloy Inorganic materials 0.000 abstract 7
- 239000013078 crystal Substances 0.000 abstract 5
- 230000008018 melting Effects 0.000 abstract 3
- 238000002844 melting Methods 0.000 abstract 3
- 238000005266 casting Methods 0.000 abstract 2
- 230000015271 coagulation Effects 0.000 abstract 1
- 238000005345 coagulation Methods 0.000 abstract 1
- 230000005415 magnetization Effects 0.000 abstract 1
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE:To enable performance excellent in saturation magnetization, coercive force or the rectangular properties of a hysteresis loop by casting an alloy into a mold at a bath temperature sufficiently higher than the melting point of the alloy and bringing the specific volume ratio or more of the macrostructure of a cast ingot to a columnar crystal. CONSTITUTION:An alloy is casted into a mold at a bath temperature sufficiently higher than the melting point of the alloy, and 50vol.% or more of the macrostructure of a cast ingot is brought to columnar crystals. The bath temperature at the time of casting is elevated as much as possible, and the quantity of coagulation nuclei generated at a time when the alloy is casted into the mold is reduced, thus increasing the rate of the columnar crystals. It is desirable that the molten alloy is changed into the columnar crystals at a volume ratio of 50% or more by raising the bath temperature to the melting point of the molten alloy +320 deg.C or more. It is more preferable that it is turned into the columnar crystals at the volume ratio of 70% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63196826A JPS6486502A (en) | 1980-12-16 | 1988-08-05 | Manufacture of permanent magnet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17798280A JPS5699174A (en) | 1979-12-17 | 1980-12-16 | Joining device for thermoplastic thread or tape |
| JP63196826A JPS6486502A (en) | 1980-12-16 | 1988-08-05 | Manufacture of permanent magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6486502A true JPS6486502A (en) | 1989-03-31 |
Family
ID=26498322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63196826A Pending JPS6486502A (en) | 1980-12-16 | 1988-08-05 | Manufacture of permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6486502A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57100705A (en) * | 1980-12-16 | 1982-06-23 | Seiko Epson Corp | Permanent magnet |
-
1988
- 1988-08-05 JP JP63196826A patent/JPS6486502A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57100705A (en) * | 1980-12-16 | 1982-06-23 | Seiko Epson Corp | Permanent magnet |
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